Support `COLUMNS(* EXLCUDE(col1, col2))` syntax

[ryanschneider]

DuckDB supports excluding columns via this syntax:

SELECT COLUMNS(* EXCLUDE(col1, col2)) FROM tbl

Currently this format gives a syntax error:

Parse error: sql parser error: Expected: ), found: EXCLUDE at Line: 1, Column: 18

More details at: https://duckdb.org/docs/stable/sql/expressions/star.html#columns-expression

Note that other modifiers beyond EXCLUDE are supported, such as REPLACE, RENAME, LIKE etc, see the syntax diagram at https://duckdb.org/docs/stable/sql/query_syntax/select.html#syntax (click star-options on the digram to expand).

This highly suggests that the general solution for this would be to add a new Expr::Columns expression enum with parsing logic somewhat similiar to Expr::MatchAgainst, and then add logic in parse_select_item to support returning a SelectItem::UnnamedExpr(Expr::Columns).